61150066015 has 4 divisors (see below), whose sum is σ = 73380079224. Its totient is φ = 48920052808.

The previous prime is 61150066009. The next prime is 61150066027. The reversal of 61150066015 is 51066005116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61150066015 - 2⁹ = 61150065503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6115006597 + ... + 6115006606.

It is an arithmetic number, because the mean of its divisors is an integer number (18345019806).

Almost surely, 2^61150066015 is an apocalyptic number.

61150066015 is a deficient number, since it is larger than the sum of its proper divisors (12230013209).

61150066015 is a wasteful number, since it uses less digits than its factorization.

61150066015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12230013208.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 61150066015 in words is "sixty-one billion, one hundred fifty million, sixty-six thousand, fifteen".